are there any new games with the same scale of BF2? The mass chaos and huge maps of a 64 player BF2 game is just incredible.

You should check out Project Reality - it's a free game that is built on top of the BF2 engine with a focus on realism and teamwork. Using the game's 'Mumble' software it's possible to not only communicate your squad but also with other people playing the game It's more graphics intensive so a hardy gaming system and fast internet connection is needed and some servers support 128 players/map